/*
 * Copyright (c) 2012, marco.tamburelli@gmail.com
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met: 
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.bmi.gwt.mi.server.core.event;

import java.util.HashMap;

import javax.servlet.ServletContext;

import org.bmi.gwt.mi.server.channel.ChannelFactory;
import org.bmi.gwt.mi.server.events.QueueEvent;
import org.bmi.gwt.mi.shared.BroadChannel;
import org.bmi.gwt.mi.shared.Channel;
import org.bmi.gwt.mi.shared.exceptions.NameParseException;

/**
 * For internal use only.
 */
class QueueEventImpl implements QueueEvent
{
	private final ChannelFactory channelFactory;
	private final Channel source;

	private final HashMap<String, Object> sourceQueueSession;
	private ServletContext servletContext;

	QueueEventImpl(ChannelFactory channelFactory, String queueName, ServletContext servletContext)
	{
		this.channelFactory = channelFactory;
		this.source = this.channelFactory.getChannelNoBind(queueName);

		this.sourceQueueSession = this.channelFactory.getQueueSession(queueName);
		this.servletContext = servletContext;
	}

	@Override
	public Channel getSourceQueueChannel()
	{
		return this.source;
	}

	@Override
	public BroadChannel getBroadChannel(String queueExpression) throws NameParseException
	{
		return this.channelFactory.getBroadChannel(queueExpression);
	}

	@Override
	public Channel getChannel(String queueName) throws NameParseException
	{
		return this.channelFactory.getChannel(queueName);
	}

	@Override
	public boolean isQueueAlive(String queueName) throws NameParseException
	{
		return this.channelFactory.isQueueAlive(queueName);
	}

	@SuppressWarnings("unchecked")
	@Override
	public <T> T getQueueSessionAttribute(String name)
	{
		return (T) this.sourceQueueSession.get(name);
	}

	@Override
	public <T> void setQueueSessionAttribute(String name, T value)
	{
		this.sourceQueueSession.put(name, value);
	}

	@SuppressWarnings("unchecked")
	@Override
	public <T> T removeQueueSessionAttribute(String name)
	{
		return (T) this.sourceQueueSession.remove(name);
	}

	@Override
	public ServletContext getServletContext()
	{
		return this.servletContext;
	}
}
